User-Created Database format. You can create databases containing your own waypoints and/or for navaids/airports not in the main database. You don't need programming experience - the files can be created for example using Microsoft Excel's ascii-file export feature or even the venerable notepad. Here's an example of an NDB file. Note the following about NDB files. They have extension NDB. Name can be anything. These files are text files with each navaid/airport in a separate line. The line terminator can be CR or CR-LF. The fields within a line are delimited by the TAB character. There are two record types - one for navaids and the other for airports. Both can co-exist in the same file. The navaid record has 8 fields. ID - upto 5 letter id. Name - full name. Displayed when clicked on ID. State - US state. not used. Lat - format [+/-] Negative for southern hemisphere. Lon - format [+/-] Negative for points west of prime meridian (see example below. Magvar - magnetic variation. not used. Freq - freq for the navaid. Displayed when clicked on ID. For example: SAX SPARTA NJ VORTAC 41.067514 -74.538325 11W 115.70. The fractional part for lat/lon, is a fraction of 1 degree. For example 10 degree, 59 min and 58 seconds should be specified as: 10.0 + (59/60) + (58/3600) = 10.983. Some books/charts specify position as deg where sss is a fraction of 1 minute (e.g. 41° 31.95´ S). To make it easy to enter such entries, there's an alternate style. The example above can be specfied as -41:31.95. The airport record has 10 fields. ID - full ICAO airport code in uppercase. Name - displayed when clicked on ID. State - not used. Address - not used. Lat - same as navaid. Lon - same as navaid. Elevation - in feet (MSL) - Used for airport info. If you don't know the elevation, leave the field blank. Magvar - the number of degrees and 'E' or 'W'. Used for gps units that do not output magnetic variance. See example below. If you don't know the mag-var value, leave the field blank. Runway - not used. Length - not used. For example: CDW CALDWELL NJ ESSEX COUNTY 40.875223 -74.281357 173 13W 04/22 4553. Note: The NDB files you create have to be in the install folder - that's the same folder where is installed. Note: Navgps will not report syntax errors during load-time. But if you're using Navgps Pro 3.14+, "My Documents navgps load file will contain the load status of the last session. If your entries are not showing up, open that file with File Explorer.
PREVIOUS NEXT